Sweet Charity (1969)

Taxi dancer Charity (Shirley MacLaine) continues to have Faith in the human race
despite apparently endless disappointments at its hands, and Hope that she will finally meet the nice young man to romance her away from her sleazy life.
Maybe, just maybe, handsome Oscar (John McMartin) will be the one to do it.

Grand Central is a commuter rail terminal station at 42nd Street and Park Avenue. Built by and named for the New York Central Railroad in the heyday of American long-distance passenger rail travel, it is the largest train station in the world by number of platforms.